2-Bromo-5-nitro-3-(trifluoromethoxy)pyridine-4-carboxylic acid
4-Chloro-3-cyano-6-(trifluoromethoxy)pyridine-2-carboxaldehyde
6-Bromo-4-nitro-3-(trifluoromethoxy)pyridine-2-carboxylic acid
4-Chloro-3-cyano-2-(trifluoromethoxy)pyridine-6-carboxaldehyde